Article - Top 10 Common Estimation Oversights


In the table below I have complied my own "cheat sheet" for the most typical estimation mistakes committed by project managers (see Table 1).

Table 1


Do you think I was able to capture the most important ones or can you add other estimation mistakes to this list? Please leave your comments below.

About the Author

Jamal Moustafaev, MBA, PMP – president and founder of Thinktank Consulting is an internationally acclaimed expert and speaker in the areas of project/portfolio management, scope definition, process improvement and corporate training. Jamal Moustafaev has done work for private-sector companies and government organizations in Canada, US, Asia, Europe and Middle East.  Read Jamal’s Blog @

Jamal is an author of two very popular books: Delivering Exceptional Project Results: A Practical Guide to Project Selection, Scoping, Estimation and Management and Project Scope Management: A Practical Guide to Requirements for Engineering, Product, Construction, IT and Enterprise Projects.